智南针

The WIPO collection of intellectual property material for both experts and those new to the field. Includes publications, databases, statistics, multimedia and more.

I译+ ，一个可信赖的专利翻译服务平台

知识产权法律法规

专利查询,专利检索,专利下载,中国专利下载,专利号查询,cnipr,中国专利,发明,实用新型,外观,专利申请

北京维讼律师事务所

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This patent search tool allows you not only to search the PCT database of about 2 million International Applications but also the worldwide patent collections. This search facility features: flexible search syntax; automatic word stemming and relevance ranking; as well as graphical results.

知呱呱专利质量评估专利管理专利交易全球专利查询检索平台